The analysis of content texts of curriculum standards representation showed two main problems:one was how to select the core content which meant the determination of content standards, another was how to develop the performance standards. The former needed to select the key concept and express it accurately, while the latter needed to describe students' learning performance accordingly and set the level of students' understanding. From the view of learning progressions, three elements (the concept, the performance and the understanding level) answered the questions of what was progressing in learning process. They were the three elements of learning progressions, based on which, both the students' learning performance and the standards statement could be evaluated.

This paper discussed HPS mode in the teaching of primary battery, pointed out that teaching design should be based on teachers' correct understanding of the knowledge generation process; representative history of chemistry should be selected as teaching materials; teaching contents should fully reflect the connection of chemistry and the actual social production.

In chemistry teaching, "self-black" meant that the chemistry educator intentionally or unintentionally carried on the negative propaganda to the chemistry, caused the students or the society to have the bad impression to chemistry."Self-black" in chemistry teaching were mainly such as follows:the use of negative material into the classroom; the creation of a negative situation into questions; exaggerating the negative dangers of experimental operations; amplifying the negative impact of social cognition. According to the above of four aspects, this paper put forward four strategies to overcome the problems, such as using positive classroom introduction, designing positive test questions, explaining the chemistry experiment objectively, and leading social cognition and resonance.

From the perspective of cultivating students' technology literacy, this paper selected the teaching design of "the working principle and application of the electrolytic cell", guided students to understand the role of electrolysis in the promotion of scientific research, let students begin to explore and understand the order of the ion discharge and the relevant scientific principles, and understand that the scientific principle was the foundation of technology development with the aid of the micro experiment. By introducing the application of electrolysis in industrial production, this paper discussed the technical elements and some methods in the process from laboratory research to industrialized production.

In the first round review of "elements and compounds" in senior three, adhering to the concept of new curriculum, this paper made 8 micro-videos for classroom teaching. Through concrete examples, this paper expounded the design ideas, contents, presentations of micro-videos. Finally,this paper briefly introduced how to use the micro-video and teaching effect.

Using SOLO classification theory, this paper analyzed the students' response to the chart short-answer questions about the complex chemical reaction, judged the level of the students' learning of chemistry, and made the SOLO learning quality analysis table. This study showed that students' learning level was dominated by multi-point structure, the main reason was that the students were unable to understand the chemical meaning of the charts about complex chemical reaction. At last, this paper proposed cultivating students' comprehension ability from 4 aspects.

This paper probed the ingredients of the thought experiment in the teaching of chemistry experiment from the three aspects:teachers' experiment design, students' experiment preparation and textbooks. Based on this analysis, this paper excavated the teaching value of the thought experiment:the teachers could improve the design of experiment teaching with the help of thought experiment; the students could apply the thought experiment to prepare for an experiment; the teachers could use a thought experiment to demonstrate chemistry charm in their classes.

This paper introduced an experimental scheme on phenol reacting with sodium and proved that phenolic hydroxy group was more active than alcoholic hydroxyl group. This experiment was simple to handle and its phenomena lasted obvious, which was suitable for class demonstration and beneficial to teaching.

This paper designed integrated experiment device using pure oxygen, spherical drying tubes, and thin wire balls, solved the problem of long time for the iron corrosion experiment. The improved experiment could be completed in a very short time and thus improved the experiment efficiency and teaching effectiveness.

Traditional oxygen absorption corrosion experiment of iron consumed long time, the phenomena were not obvious, and the effect of classroom demonstration was poor. This study used U-type tube and sensitive ammeter device to improve oxygen absorption corrosion experiment of iron, which presented completely the macroscopic phenomena, microscopic essence and symbolic representation of experiment combining with principle analysis, and enriched students' knowledge of this part. The results showed that experiment teaching based on the triple representation could improve students' achievement scores.

This paper used ethephon to prepare ethylene quickly and tested its properties, and designed experiment of ethylene ripening fruit. The improved experiment was simple and interesting with obvious phenomena. The designed microscale experiment could make students carry on experimental inquiry.

This paper used half-amalgamation zinc plates to do the experiment of copper-zinc primary battery, immersed the amalgamating end and non-amalgamating end of zinc plates into dilute sulphuric acid successively and measured the current and voltage. Then this article calculated the percentage loss of current and voltage by comparing the amalgamating side and non-amalgamating side so that H₂ produced on zinc plate could be represented quantitatively. This experiment was improved from three aspects:zinc electrode, copper electrode and the concentration of dilute sulphuric acid, in order to reduce bubbles from zinc plate.

This paper used unit cell vector method to confirm dot matrix types and structure units of crystals, and put forward the concept of characteristic vector of dot matrix, making this method more simple and practical.